ITK  4.1.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Protected Member Functions | Private Member Functions | Private Attributes
itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType > Class Template Reference

#include <itkLaplacianSegmentationLevelSetImageFilter.h>

+ Inheritance diagram for itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >:
+ Collaboration diagram for itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >:

List of all members.

Public Types

typedef SmartPointer< const SelfConstPointer
typedef
Superclass::FeatureImageType 
FeatureImageType
typedef
LaplacianSegmentationLevelSetFunction
< OutputImageType,
FeatureImageType
LaplacianFunctionType
typedef Superclass::OutputImageType OutputImageType
typedef SmartPointer< SelfPointer
typedef
LaplacianSegmentationLevelSetImageFilter 
Self
typedef
SegmentationLevelSetImageFilter
< TInputImage, TFeatureImage,
TOutputPixelType > 
Superclass
typedef Superclass::ValueType ValueType

Public Member Functions

virtual const char * GetNameOfClass () const

Protected Member Functions

virtual void PrintSelf (std::ostream &os, Indent indent) const

Private Member Functions

 LaplacianSegmentationLevelSetImageFilter (const Self &)
void operator= (const Self &)

Private Attributes

LaplacianFunctionType::Pointer m_LaplacianFunction
virtual ::itk::LightObject::Pointer CreateAnother (void) const
static Pointer New ()
 ~LaplacianSegmentationLevelSetImageFilter ()
 LaplacianSegmentationLevelSetImageFilter ()

Detailed Description

template<class TInputImage, class TFeatureImage, class TOutputPixelType = float>
class itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >

Segments structures in images based on a second derivative image features.

IMPORTANT
The SegmentationLevelSetImageFilter class and the LaplacianSegmentationLevelSetFunction class contain additional information necessary to the full understanding of how to use this filter.
OVERVIEW
This class is a level set method segmentation filter. It constructs a speed function which is zero at image edges as detected by a Laplacian filter. The evolving level set front will therefore tend to lock onto zero crossings in the image. The level set front moves fastest near edges.
The Laplacian segmentation filter is intended primarily as a tool for refining existing segmentations. The initial isosurface (as given in the seed input image) should ideally be very close to the segmentation boundary of interest. The idea is that a rough segmentation can be refined by allowing the isosurface to deform slightly to achieve a better fit to the edge features of an image. One example of such an application is to refine the output of a hand segmented image.
Because values in the Laplacian feature image will tend to be low except near edge features, this filter is not effective for segmenting large image regions from small seed surfaces.
INPUTS
This filter requires two inputs. The first input is a seed image. This seed image must contain an isosurface that you want to use as the seed for your segmentation. It can be a binary, graylevel, or floating point image. The only requirement is that it contain a closed isosurface that you will identify as the seed by setting the IsosurfaceValue parameter of the filter. For a binary image you will want to set your isosurface value halfway between your on and off values (i.e. for 0's and 1's, use an isosurface value of 0.5).
The second input is the feature image. This is the image from which the speed function will be calculated. For most applications, this is the image that you want to segment. The desired isosurface in your seed image should lie within the region of your feature image that you are trying to segment.

Note that this filter does no preprocessing of the feature image before thresholding. Because second derivative calculations are highly sensitive to noise, isotropic or anisotropic smoothing of the feature image can dramatically improve the results.

See SegmentationLevelSetImageFilter for more information on Inputs.
OUTPUTS
The filter outputs a single, scalar, real-valued image. Positive *values in the output image are inside the segmentated region and negative *values in the image are outside of the inside region. The zero crossings of *the image correspond to the position of the level set front.
See SparseFieldLevelSetImageFilter and SegmentationLevelSetImageFilter for more information.
PARAMETERS
This filter has no parameters other than those described in SegmentationLevelSetImageFilter.
See also:
SegmentationLevelSetImageFilter
LaplacianSegmentationLevelSetFunction,
SparseFieldLevelSetImageFilter

Definition at line 104 of file itkLaplacianSegmentationLevelSetImageFilter.h.


Member Typedef Documentation

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef SmartPointer< const Self > itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::ConstPointer
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef Superclass::FeatureImageType itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::FeatureImageType
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef LaplacianSegmentationLevelSetFunction< OutputImageType, FeatureImageType > itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::LaplacianFunctionType

Type of the segmentation function

Definition at line 122 of file itkLaplacianSegmentationLevelSetImageFilter.h.

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef Superclass::OutputImageType itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::OutputImageType
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef SmartPointer< Self > itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Pointer
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef LaplacianSegmentationLevelSetImageFilter itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Self
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef SegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType > itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::Superclass
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
typedef Superclass::ValueType itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::ValueType

Inherited typedef from the superclass.

Reimplemented from itk::SegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >.

Definition at line 116 of file itkLaplacianSegmentationLevelSetImageFilter.h.


Constructor & Destructor Documentation

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::~LaplacianSegmentationLevelSetImageFilter ( ) [inline, protected]

Method for creation through the object factory

Definition at line 130 of file itkLaplacianSegmentationLevelSetImageFilter.h.

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::LaplacianSegmentationLevelSetImageFilter ( ) [protected]

Method for creation through the object factory

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::LaplacianSegmentationLevelSetImageFilter ( const Self ) [private]

Member Function Documentation

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
virtual::itk::LightObject::Pointer itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::CreateAnother ( void  ) const [virtual]
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
virtual const char* itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::GetNameOfClass ( ) const [virtual]

Run-time type information (and related methods).

Reimplemented from itk::SegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >.

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
static Pointer itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::New ( ) [static]
template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
void itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::operator= ( const Self ) [private]

Flag to indicate whether Speed and Advection images are automatically generated when running the filter. Otherwise, a pointer to images must be explicitly set or GenerateSpeedImage() and/or GenerateAdvectionImage() called directly before updating the filter

Reimplemented from itk::SegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >.

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
virtual void itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::PrintSelf ( std::ostream &  os,
Indent  indent 
) const [protected, virtual]

Member Data Documentation

template<class TInputImage , class TFeatureImage , class TOutputPixelType = float>
LaplacianFunctionType::Pointer itk::LaplacianSegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >::m_LaplacianFunction [private]

The documentation for this class was generated from the following file: